Oil filter



NOV. 7, 1939. F D Q 2,178,930

OIL FILTER Filed June 29, 1937 2 Sheets-Sheet l Inventor /7 27'/)/Gwygr/ By M w fim Attorneys NOV. 7, 1939. CRAWFORD 2.178.930

OIL FILTER Filed June 29, 1937 2 Sheets-Sheet 2 I Inuenior Harv v Ga a0rd A iiomeys Patented Nov. 7, 1939 1 Claim.

ful improvements in oil filters particularly for the internal combustionengines of motor vehicles but it will be understood, of course, that iia filter constructed in accordance with the present invention may beused for any purpose for which it may be found adapted and desirable.

One of the important of the invention is to provide, in a manner ashereinafter set lo forth, a filter of the aforem ntioned characterembodying a novel construe on, combination and arrangement of partswhereby the filtering medium, such as felt or any other suitablematerial, may be compressed or asdesired to meet various conditions,such as when heavy,

medium or light oil is being used.

Another very important object of the invention is to provide an oilfilter of the character described embodying a construction which is suchthat the filtering medium may be conveniently removed and replaced whendesired.

Still another very important object of the invention is to provide'anoil filter of the character set forth which is adapted to be operativelyconnected with the water cooling system of the engine in a manner toheat the oil as it passes through said filter.

A still further important object of I the invention is to provide afilter of the character described embodying a construction andarrangement whereby the force of gravity is also utilized to separateforeign matter, such as dirt, grit, etc, from the oil.

Other objects of the invention are to provide an oil filter of theaforementioned which will be comparatively sirnpie in construc. tion,strong, durable, highly efficient and reliable in use, compact, light inweight and which may be manufactured at low cost.

49 All of the foregoing and still further objects and advantages of theinvention will become apparent from a study of the followingspecification, taken in connection with the accompanying drawingswherein like characters of reference 45 designate corresponding partsthroughout the several views, and wherein 5 Figure l is a view invertical section through an oil filter constructed in accordance withthe present invention.

50 Figure 2 is a view in horizontal se ,tion, taken substantially theline 22 of 1.

Figure 3 is a detail view perspective of the perforated piston.

Figure 4 is a detail view in perspective of the 55 vertically movable,perforated disk.

, ders 22.

. The present invention relates new and use: p

Figure 5 is; a perspective view of the vertically spaced perforatedbaffles.

Referring now to the drawings in detail, it-

will be seen that the embodiment of the inven tion which has illustratedcomprises a cy-- 6 lind rical housing 2 of suitable dimensions andmaterial, said housing being provided with a substantially conicalbottom 2 which is provided with a drain plug 3-. The top of thecylindrical housing 5- is open and formed thereon is an I0 externalflange i. The reference numeral 5 designates-a closure for the top ofthe housing i, said closure being secured to the flange l, as at B.

. Depending from the closure 5 into the housing l in spaced, concentricrelation thereto is a cylinl5 der 1. The cylinder l extends downwardlyto an intermediate point in the housing i and threadedly mounted in thelower end portion of said' cylinder is a removable perforated plate 8.Mounted for vertically adjustment in the lower 0 portion of the cylinder1 is a perforated disk 9. The reference numeral i0 designates aperforated piston which is slidably mounted in the cylinder l and whichis provided with a centrally located,.depending supporting stem H whichis 25 mounted in a socket I2 which is provided there- .for on the disk9. A comparatively loosely packed filtering medium i3 is provided in thecylinder 1 between the disk 9 and the piston to. Threadedly mounted inthe plate a is an adjustingscrew 0 or bolt M on which the disk it rests.

An oil discharge pipe l5 communicates with the upper end of the cylinder1 through the closure 5. Mounted in the upper end portion of thecylinder 1 is a substantially concavo convex per- 35 forated disk It. Asubstantially similar disk ll rests on the raised central portion I8 onthe piston it. Mounted between the elements It and ll in the upperportion of the cylinder 1 is a comparatively tightly packed filteringmedium [9. 40 An oil inlet pipe 20 communicates with the upper l portionof the housing I through the closure 5. The reference numeral 2idesignates a vent valve in the closure 5 for releasing air that mayaccumulate in the housing l.

Vertically spaced shoulders 22 are formed in the lower portion of thecylindrical housing I in spaced relation below the lower end of thecylinder l and mounted horizontally on said shoulders are perforatedbafiles 23.- A bolt 24 secures the baiiles 23 together in spacedrelation. Rising from the upper baffles 23 is a substantially U-, shapedstop member 25 which is engaged beneath the plate 8 for retaining thebaflles on the shoul- Encircling the major portion of the housing I is ahot water jacket 26. The jacket 26 is provided with an inlet 21 and anoutlet 28 for connection with the water cooling system of the engine(not shown).

Briefly, the operation of the device is substantially as follows:

Oil from the pipe 20 enters the top of the housing i and flowsdownwardly between said housing and the cylinder I. After passing thelower end of the cylinder l, the oil flows upwardly into said cylinderthrough the perforations in the plate 8, through the disk 9, the mediumI3, the perforated piston IE, the element 'I'I, the medium I9 and thenthrough the element I6 to the discharge pipe I5. By operating theadjusting bolt I4 the perforated disk 8 and the perforated piston I maybe moved upwardly in the cylinder I for compressing the filtering mediumI9 as desired. For example, the medium I9 will be comparatively tightlypacked or compressed when light oil is being used in the engine. As theoil flows downwardly and then upwardly in the device, dirt, grit andother foreign matter will be separated therefrom by gravity and passdownwardly through the vertically spaced perforated ,bafiles 23 into thesediment chamber 29 in the lower end portion of the housing I. Thesediment laden oil in the chamber 2| may be conveniently drained byremoving the plug 3. The filtering or cleaning of the oil is furtherfacilitated and promoted by the flow of hot Water from the coolingsystem of the engine through the jacket 26 which, of course, heats theoil in the housing I. By removing the closure with the cylinder Ithereon from the housing I and then removing the plate 8 from saidcylinder the elements in said cylinder, such as the filtering mediums I3and I9, may be conveniently. removed to be renewed or for any otherpurpose.

It is believed that the many advantages of an oil filter constructed inaccordance with the present invention will be readily understood andalthough a preferred embodiment of the device is as illustrated anddescribed, it is to be understood that changes in the details ofconstruction and in the combination and arrangement of parts may beresorted to which will fall within the scope of the invention asclaimed.

What is claimed is:

An oil filter comp-rising a cylindrical housing having a substantiallyconical bottom and open flanged top, an integral jacket surrounding saidhousing intermediate the ends thereof having fluid inlet and outletopenings therein for connection with a hot water supply, a closure forsaid housing having oil inlet and outlet openings therein, a cylinderdepending from said closure in spaced relation to said housingcommunicating with said oil inlet at its lower end and communicatingwith said oil outlet at its upper end, a piston slidably mounted in saidcylinder, a filtering medium in said cylinder adjacent said piston,perforated disks above and below said filtering medium and means foractuating said piston for compressing said filtering medium between saiddisks.

HARRY D. CRAWFORD.

